When the whole shindig with Deun Yu, Muk Yeun Ching, Chung Man Sau, the Four Great Evils, Deun Jing Ming, Deun Jing Tsun, the Yellow Eyebrowed Monk, etc., was going down in Dali, Kiu Fung had yet to be even mentioned in DGSD (and wouldn't appear until a bit later). During DGSD, Kiu Fung never wandered anywhere near Dali (his activities were almost exclusively up north).
But imagine if he had (for whatever reason) gone down to Dali during that time. His instincts as a hero would have obliged him to help the Deuns out against the Great Evils. Needless to say, his martial arts were far more than sufficient to defeat the Evils, but I wonder...would Deun Yin Hing still have insisted on a go match with Kiu Fung (a game that Deun should win against Kiu, seeing that Deun was an expert whereas Kiu wasn't known for being a go player, although this being DGSD, Kiu could pull off a Hui Juk-style lucky win), or would Kiu Fung simply have blasted the Evils with Hong Lung 28 Palms and let that be the end of it?